======================================
| [   12.956518][   T11] ==================================================================
| [ 12.956831][ T11] BUG: KASAN: use-after-free in page_pool_item_uninit (net/core/page_pool.c:523)
| [   12.957043][   T11] Read of size 8 at addr ffff88800b308008 by task kworker/u16:0/11
| [   12.957245][   T11]
[   12.957564][   T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   12.957735][   T11] Workqueue: netns cleanup_net
[   12.957882][   T11] Call Trace:
[   12.957988][   T11]  <TASK>
[ 12.958072][ T11] dump_stack_lvl (lib/dump_stack.c:123)
[ 12.958218][ T11] print_address_description.constprop.0 (mm/kasan/report.c:379)
[ 12.958396][ T11] ? page_pool_item_uninit (net/core/page_pool.c:523)
[ 12.958542][ T11] print_report (mm/kasan/report.c:490)
[ 12.958687][ T11] ? kasan_addr_to_slab (./include/linux/mm.h:1295 mm/kasan/../slab.h:211 mm/kasan/common.c:38)
[ 12.958827][ T11] kasan_report (mm/kasan/report.c:604)
[ 12.958933][ T11] ? page_pool_item_uninit (net/core/page_pool.c:523)
[ 12.959074][ T11] page_pool_item_uninit (net/core/page_pool.c:523)
[ 12.959213][ T11] page_pool_release (net/core/page_pool.c:1431 net/core/page_pool.c:1484)
[ 12.959350][ T11] ? __folio_put (mm/swap.c:98)
[ 12.959490][ T11] ? __pfx_page_pool_release (net/core/page_pool.c:1478)
[ 12.959632][ T11] ? __page_pool_return_page (./include/net/netmem.h:93 ./include/net/netmem.h:104 net/core/page_pool.c:1054)
[ 12.959776][ T11] page_pool_destroy (net/core/page_pool.c:1555)
[ 12.959914][ T11] veth_napi_del_range (drivers/net/veth.c:1054 (discriminator 3))
[ 12.960056][ T11] ? mark_held_locks (kernel/locking/lockdep.c:4321)
[ 12.960199][ T11] veth_disable_xdp (drivers/net/veth.c:1061 drivers/net/veth.c:1162)
[ 12.960338][ T11] veth_close (drivers/net/veth.c:1383)
[ 12.960441][ T11] __dev_close_many (net/core/dev.c:1591)
[ 12.960579][ T11] ? __pfx___dev_close_many (net/core/dev.c:1555)
[ 12.960722][ T11] dev_close_many (net/core/dev.c:1618)
[ 12.960859][ T11] ? fou_exit_net (net/ipv4/fou_core.c:1234)
[ 12.960996][ T11] ? __pfx_dev_close_many (net/core/dev.c:1608)
[ 12.961133][ T11] ? __mutex_trylock_common (./arch/x86/include/asm/atomic64_64.h:101 ./include/linux/atomic/atomic-arch-fallback.h:4296 ./include/linux/atomic/atomic-long.h:1482 ./include/linux/atomic/atomic-instrumented.h:4458 kernel/locking/mutex.c:104)
[ 12.961274][ T11] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:79)
[ 12.961448][ T11] unregister_netdevice_many_notify (net/core/dev.c:11562)
[ 12.961621][ T11] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:11529)
[ 12.961794][ T11] ? default_device_exit_batch (net/core/dev.c:12122)
[ 12.961933][ T11] ? mutex_is_locked (./arch/x86/include/asm/atomic64_64.h:15 ./include/linux/atomic/atomic-arch-fallback.h:2583 ./include/linux/atomic/atomic-long.h:38 ./include/linux/atomic/atomic-instrumented.h:3189 kernel/locking/mutex.h:47 kernel/locking/mutex.c:66)
[ 12.962072][ T11] ? rtnl_is_locked (net/core/rtnetlink.c:163)
[ 12.962210][ T11] ? unregister_netdevice_queue (net/core/dev.c:11514)
[ 12.962382][ T11] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11513)
[ 12.962553][ T11] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11513)
[ 12.962732][ T11] default_device_exit_batch (net/core/dev.c:12136)
[ 12.962888][ T11] ? __pfx_default_device_exit_batch (net/core/dev.c:12111)
[ 12.963059][ T11] ? ops_exit_list (net/core/net_namespace.c:171 (discriminator 3))
[ 12.963198][ T11] cleanup_net (net/core/net_namespace.c:647 (discriminator 3))
[ 12.963336][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814)
[ 12.963476][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:592)
[ 12.963613][ T11] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37))
[ 12.963755][ T11] ? lock_acquire (kernel/locking/lockdep.c:5822)
[ 12.963892][ T11] ? process_one_work (kernel/workqueue.c:3205)
[ 12.964036][ T11] process_one_work (kernel/workqueue.c:3229)
[ 12.964176][ T11] ? __pfx___lock_release (kernel/locking/lockdep.c:5501)
[ 12.964314][ T11] ? __pfx_process_one_work (kernel/workqueue.c:3131)
[ 12.964454][ T11] ? assign_work (kernel/workqueue.c:1200)
[ 12.964594][ T11] worker_thread (kernel/workqueue.c:3304 kernel/workqueue.c:3391)
[ 12.964735][ T11] ? __pfx_worker_thread (kernel/workqueue.c:3337)
[ 12.964875][ T11] kthread (kernel/kthread.c:389)
[ 12.964981][ T11] ? __pfx_kthread (kernel/kthread.c:342)
[ 12.965122][ T11] ret_from_fork (arch/x86/kernel/process.c:147)
[ 12.965262][ T11] ? __pfx_kthread (kernel/kthread.c:342)
[ 12.965400][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:257)
| [   12.968674][   T11] Disabling lock debugging due to kernel taint
| [   12.968879][   T11] Oops: general protection fault, probably for non-canonical address 0xf99995999999999c: 0000 [#1] PREEMPT SMP KASAN NOPTI
| [   12.969202][   T11] KASAN: maybe wild-memory-access in range [0xcccccccccccccce0-0xcccccccccccccce7]
| [   12.969712][   T11] Tainted: [B]=BAD_PAGE
[   12.969815][   T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   12.969981][   T11] Workqueue: netns cleanup_net
[ 12.970124][ T11] RIP: 0010:page_pool_item_uninit (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/linux/refcount.h:136 net/core/page_pool.c:524)
[ 12.970298][ T11] Code: ba 48 bb 00 00 00 00 00 fc ff df 48 c1 ed 03 48 01 dd 4d 8d 75 1c be 04 00 00 00 4c 89 f7 e8 ad 6d 63 fe 4c 89 f0 48 c1 e8 03 <0f> b6 14 18 4c 89 f0 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 62 41
All code
========
   0:	ba 48 bb 00 00       	mov    $0xbb48,%edx
   5:	00 00                	add    %al,(%rax)
   7:	00 fc                	add    %bh,%ah
   9:	ff                   	(bad)
   a:	df 48 c1             	fisttps -0x3f(%rax)
   d:	ed                   	in     (%dx),%eax
   e:	03 48 01             	add    0x1(%rax),%ecx
  11:	dd 4d 8d             	fisttpll -0x73(%rbp)
  14:	75 1c                	jne    0x32
  16:	be 04 00 00 00       	mov    $0x4,%esi
  1b:	4c 89 f7             	mov    %r14,%rdi
  1e:	e8 ad 6d 63 fe       	call   0xfffffffffe636dd0
  23:	4c 89 f0             	mov    %r14,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
  2a:*	0f b6 14 18          	movzbl (%rax,%rbx,1),%edx		<-- trapping instruction
  2e:	4c 89 f0             	mov    %r14,%rax
  31:	83 e0 07             	and    $0x7,%eax
  34:	83 c0 03             	add    $0x3,%eax
  37:	38 d0                	cmp    %dl,%al
  39:	7c 04                	jl     0x3f
  3b:	84 d2                	test   %dl,%dl
  3d:	75 62                	jne    0xa1
  3f:	41                   	rex.B

Code starting with the faulting instruction
===========================================
   0:	0f b6 14 18          	movzbl (%rax,%rbx,1),%edx
   4:	4c 89 f0             	mov    %r14,%rax
   7:	83 e0 07             	and    $0x7,%eax
   a:	83 c0 03             	add    $0x3,%eax
   d:	38 d0                	cmp    %dl,%al
   f:	7c 04                	jl     0x15
  11:	84 d2                	test   %dl,%dl
  13:	75 62                	jne    0x77
  15:	41                   	rex.B
[   12.970772][   T11] RSP: 0018:ffffc900000b7658 EFLAGS: 00010a06
[   12.970941][   T11] RAX: 199999999999999c RBX: dffffc0000000000 RCX: ffffffffb929f6e3
[   12.971138][   T11] RDX: 0000000000000000 RSI: 0000000000000004 RDI: cccccccccccccce0
[   12.971338][   T11] RBP: fffffbfff7524c78 R08: 0000000000000000 R09: fffffbfff78ff688
[   12.971539][   T11] R10: ffffffffbc7fb447 R11: 205d313154202020 R12: ffff88800b0a3620
[   12.971736][   T11] R13: ccccccccccccccc4 R14: cccccccccccccce0 R15: ffffea00002518c0
[   12.971935][   T11] FS:  0000000000000000(0000) GS:ffff88806d080000(0000) knlGS:0000000000000000
[   12.972164][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   12.972335][   T11] CR2: 00007fd320f08270 CR3: 000000005273a003 CR4: 0000000000772ef0
[   12.972537][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   12.972735][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   12.972945][   T11] PKRU: 55555554
[   12.973045][   T11] Call Trace:
[   12.973144][   T11]  <TASK>
[ 12.973218][ T11] ? die_addr (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:460)
[ 12.973322][ T11] ? exc_general_protection (arch/x86/kernel/traps.c:751 arch/x86/kernel/traps.c:693)
[ 12.973460][ T11] ? asm_exc_general_protection (./arch/x86/include/asm/idtentry.h:617)
[ 12.973594][ T11] ? page_pool_item_uninit (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/linux/refcount.h:136 net/core/page_pool.c:524)
[ 12.973727][ T11] ? page_pool_item_uninit (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/linux/refcount.h:136 net/core/page_pool.c:524)
[ 12.973860][ T11] ? page_pool_item_uninit (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/linux/refcount.h:136 net/core/page_pool.c:524)
[ 12.973996][ T11] page_pool_release (net/core/page_pool.c:1431 net/core/page_pool.c:1484)
[ 12.974135][ T11] ? __folio_put (mm/swap.c:98)
[ 12.974269][ T11] ? __pfx_page_pool_release (net/core/page_pool.c:1478)
[ 12.974401][ T11] ? __page_pool_return_page (./include/net/netmem.h:93 ./include/net/netmem.h:104 net/core/page_pool.c:1054)
[ 12.974537][ T11] page_pool_destroy (net/core/page_pool.c:1555)
[ 12.974670][ T11] veth_napi_del_range (drivers/net/veth.c:1054 (discriminator 3))
[ 12.974806][ T11] ? mark_held_locks (kernel/locking/lockdep.c:4321)
[ 12.974942][ T11] veth_disable_xdp (drivers/net/veth.c:1061 drivers/net/veth.c:1162)
[ 12.975080][ T11] veth_close (drivers/net/veth.c:1383)
[ 12.975180][ T11] __dev_close_many (net/core/dev.c:1591)
[ 12.975312][ T11] ? __pfx___dev_close_many (net/core/dev.c:1555)
[ 12.975447][ T11] dev_close_many (net/core/dev.c:1618)
[ 12.975582][ T11] ? fou_exit_net (net/ipv4/fou_core.c:1234)
[ 12.975715][ T11] ? __pfx_dev_close_many (net/core/dev.c:1608)
[ 12.975846][ T11] ? __mutex_trylock_common (./arch/x86/include/asm/atomic64_64.h:101 ./include/linux/atomic/atomic-arch-fallback.h:4296 ./include/linux/atomic/atomic-long.h:1482 ./include/linux/atomic/atomic-instrumented.h:4458 kernel/locking/mutex.c:104)
[ 12.975980][ T11] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:79)
[ 12.976149][ T11] unregister_netdevice_many_notify (net/core/dev.c:11562)
[ 12.976316][ T11] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:11529)
[ 12.976478][ T11] ? default_device_exit_batch (net/core/dev.c:12122)
[ 12.976612][ T11] ? mutex_is_locked (./arch/x86/include/asm/atomic64_64.h:15 ./include/linux/atomic/atomic-arch-fallback.h:2583 ./include/linux/atomic/atomic-long.h:38 ./include/linux/atomic/atomic-instrumented.h:3189 kernel/locking/mutex.h:47 kernel/locking/mutex.c:66)
[ 12.976747][ T11] ? rtnl_is_locked (net/core/rtnetlink.c:163)
[ 12.976880][ T11] ? unregister_netdevice_queue (net/core/dev.c:11514)
[ 12.977046][ T11] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11513)
[ 12.977211][ T11] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11513)
[ 12.977377][ T11] default_device_exit_batch (net/core/dev.c:12136)
[ 12.977510][ T11] ? __pfx_default_device_exit_batch (net/core/dev.c:12111)
[ 12.977677][ T11] ? ops_exit_list (net/core/net_namespace.c:171 (discriminator 3))
[ 12.977811][ T11] cleanup_net (net/core/net_namespace.c:647 (discriminator 3))
[ 12.977944][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814)
[ 12.978079][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:592)
[ 12.978211][ T11] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37))
[ 12.978343][ T11] ? lock_acquire (kernel/locking/lockdep.c:5822)
[ 12.978475][ T11] ? process_one_work (kernel/workqueue.c:3205)
[ 12.978611][ T11] process_one_work (kernel/workqueue.c:3229)
[ 12.978746][ T11] ? __pfx___lock_release (kernel/locking/lockdep.c:5501)
[ 12.978880][ T11] ? __pfx_process_one_work (kernel/workqueue.c:3131)
[ 12.979017][ T11] ? assign_work (kernel/workqueue.c:1200)
[ 12.979152][ T11] worker_thread (kernel/workqueue.c:3304 kernel/workqueue.c:3391)
[ 12.979288][ T11] ? __pfx_worker_thread (kernel/workqueue.c:3337)
[ 12.979421][ T11] kthread (kernel/kthread.c:389)
[ 12.979522][ T11] ? __pfx_kthread (kernel/kthread.c:342)
[ 12.979657][ T11] ret_from_fork (arch/x86/kernel/process.c:147)
[ 12.979791][ T11] ? __pfx_kthread (kernel/kthread.c:342)


Finger prints:
page_pool_item_uninit:page_pool_release:page_pool_destroy:veth_napi_del_range:veth_disable_xdp
print_report:kasan_report:page_pool_item_uninit:page_pool_release:page_pool_destroy